⚖️ BMI Calculator
Calculate your Body Mass Index instantly
How BMI is Calculated
Formula
BMI = weight (kg) ÷ height² (m²)
- 1Enter your weight and height (metric or imperial).
- 2If using metric: BMI = weight(kg) ÷ (height(m))².
- 3If using imperial: BMI = 703 × weight(lbs) ÷ (height(in))².
- 4The result is compared to WHO categories: Underweight (<18.5), Normal (18.5–24.9), Overweight (25–29.9), Obese (≥30).
- 5Your BMI and category are displayed with a color-coded indicator.
About BMI Calculator
Calculate your Body Mass Index (BMI) instantly. Enter your height and weight to find out if you're underweight, normal, overweight, or obese. Supports metric and imperial units.
Frequently Asked Questions
What is a healthy BMI range?
A BMI between 18.5 and 24.9 is considered normal weight by the World Health Organization. However, BMI doesn't account for muscle mass, age, or body composition.
Is BMI accurate for athletes?
BMI may overestimate body fat in athletes and muscular individuals, since muscle weighs more than fat. It's a general screening tool, not a definitive health measure.
What units does this calculator support?
Both metric (kg and cm) and imperial (lbs and inches). Toggle between them with one click.